Machine for testing carbon paper, typewriter ribbon, etc.



' sept. 2s 1926. 1,601,162

H.-W. A. DIXON ET AL MACHINE FOR TESTING 'CARBON PAPER, TYPEWRITTER RIBBON, ETC

Filed May 15. 1924 2 sheets-sheet 1 la n Sept. 28 1926. A1,601,162

H. W. A. DIXON ET AL MACHINE FOR TESTING CARBON PAPER, TYPEWRITTER RIBBON, ETC

Filed May l5. 1924 2 sheets-shea. .2

S31/wanton f7/TOLD Wl] D/xoN mvp Patentes. sept. as, reas.

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sexi

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' HAROLD w. A. Dixon', or nora-is, new Yoan, Aim Liiwrs ivi. Dixon, or- BLOOMFIELD,

NEW JERSEY, ASSIGNORS TO COLUMBIA RIBBONYAND CARBON MANUFACTURNG oo., iivc., or New YORK; n. Y., A conrone'rron or new YORK.

i i/rAorrrNE ron TESTING cannon' PAPER,-Tizrnwnrrnnninisoit nro.

applicati@ iednay i5,

OurV invention relates to testing machines for testing carbon paper, typewriter rib- V bons, .and the like, and is particularly adapted for making comparative tests as to the rprovision of an improved testing machine structure wherein the. type bars are always under tension, tliistension being adjustable with respect to all the bars as a unit and withrespect to each individua-l bar.

Further objects are the provision of no vcl means for holding the material being tested, and the provision of a novel paperecontain- Y ing chamberV or compartment.

Aaround the platen;

F urtherobjects'will appear hereinafter.' In the accompanying drawings, Fig. 1 is a longitudinal sectional viewl of an embodiment ofour invention;

Fig. 2 is a.V plan view thereof;V

Fig.A 3 is an enlarged view partly in section showing the means for holdingl the carl bonpaper in Vplace tov be tested and. also the means for holding and guiding the paper l Fig. t is a view of the rearvend ofthe machine of Fig. 1; Y y

Fig. 5 is a section on the line 5 5 of Fig.

1 looking vin th'ekdirectionuof the-arrows;

` and f Fig. 6 'is a ysection on the line 65-6 of 1 looking in the direction of the arrows.

Referring to the drawings in detail, 1

designates a `casing which comprises a base' 2 and vside walls 3 and Z1.

Extending transversely of the casing and liavingits bearings in thek side walls thereof is a rotatable type-operating vshaft 5, one

end of which extends vto thev exterior of the casing and has an operatinghandle 6 ainxed l thereto. Within the casingeand rigidly secured to the shaft 5 is a type b aroperat-` 1924. sefiai No. 713,589.

ingcamf'.

Pivoted type bars 8 are provided within the Vcasing 1 and extendA longitudinally thereof, these bars lying in the same hori- Zontal plane. A transverse type-bar supporting shaft 9 carries the type bars, and to space the bars from each other we provide washers 8. The type bars are movable independently of eachother about theirsupporting shaft. Each type bar comprises a forwardly extending portionor arm 10 pro-- vided with type 11 at its forward end, and a rearwardly extending arm 12 projecting beneath the shaft 5.. and in the path of the cam 7. By this construction asthe cani is rotated the type bars will be pivotedV about their supporting shaft.

A dwell lis'provided on the face of the. cam 7 for the purpose of holding the type bars out of operative-position, as will be brought out hereinafter. Lateral movement and'lost motionin the type bars is prevented by a spring 15 on the shaft 9. Y

lBelow the type bars is a series of tensionor arms are pivotally mounted on a transverse shaft 17, which isparallel to the shaft 9.` The levers are operatively connected to their respective ltype bars 8 by aspring 18.

One end of the springis connectedto the forward end of the tensioninglever and the other end is connected Vto tlie forwardly ex tending portion 10 of the type barfor the purpose of causing the keys to strike the material to be tested after the type arms ,are disengaged by theY type-operating cani y7.

The rear end of each tensioning lever is provided with anindividual.adjusting screw 19, the lower end of whichengagesa plate Y20 which is pivotally mounted at one end ron the tensioning lever supportingfsh'aft 17,` the shaft passing transversely of theY plate.V through vertical sidefanges 21 with which 95 the plate is provided. The rear of tlie'plate 2O receives a single adjusting screw 5213 A ffor ,adjust-ing the tension of all of the springs CII 18 simultaneously, whereby the force with which the type bars are operated may be varied. rIhis screw is provided with a knurled knob 2% and when rotated in one direction will bear against the base 2 of the casing, causing the plate 2O to pivot upwardly about the shaft 1T, carrying with it the screws 19, thereby causing said levers 1G to pivot,V about the same shaft 17 to increase the tension on the springs 1S. By rotating the screw 23 in the opposite direction the plate 2O will be lowered and the tension ou the type bars will be correspondingly decreased. Lateral movement of the tensioning levers 16 is conveniently prevented by a spring 25.

At the forward end of the machine we provide a paper-holding` compartment 25 adapted to receive a roll of papei-I 2T upon which the impression is to be made. This compartment is provided with a cover 2*7 which is hinged or pivotally attached at 29 to the casing. This cover is adapted to be held in closed position by means of vertical spring pins 30 (Fig. 6) held in the casing: at their lower ends by means of screws 31. The upper end of each pin is provided withv a cam 82 adapted to engage an opening or depression 88 in the cover 2S to therebv maintain the cover closed.

The roll 27 lies in the bottom of the chainber 26 between the walls 3-1 and 35 thereof. The paper is led :trom the roll through a slot 2? provided between the edge or" t-he cover 2S and the edge of the lower section ot the paper compartment7 from which it is passed about a platen 3G, between the platen and a spring pressed guide 37. This guide comprises a curved guide arm 3S having guide rollers 39 pivoted on studs 39 at each end of its extremities contactingT with the tace 01"' the platen. The lower end of this guide arm is provided with. a guide lip e0 which may be integralY therewith, and the paper passes between this lip and the platen as it leaves the paper compartment, The guide arm 38 is carried by a pin 41 to whichy it is pivoted by a. pivot pin 41", the pin 41 having a bearing in a support L12 which may be integral with the base 27 a spring; d3 which bears against the arm 3S pressing the` guide rollers 39 carried by thisiarm against the platen.

The paper from the roll 27 passes about the under side ot the platen and the-n between the platen and the guiding mechanism just referred to. atter which it is doubled back upon itself' to pass under a pressure roller llresiliently mounted on a transverse cutter l5 attached to the cover 2S ot' the paper compartment.

The holder for the carbon paper or ribbon to be tested comprises a base plate e? (Fig. 3) substantially U shaped in plan and having vertical side ilanges 4S and transclamp also substantially U shaped in plan, is Liipstally mounted. The clamp 553 is supernnposei on the base plate il and a serine' holds it in engagement with the face of tl e base plate.. The-lower transverse flanges ot the base plate l? are provided with a. series o' vertical projections LG and the r.{irrt-spending` portion ot the clamp 523 is provide-d with opening-js corresponding to said p ojsciiionsy this tonstruf :n pro- `-Vidng; means ior holding the material being 'ested in addition to the Vfaces ot' the plates lv and 53 themselves. To facilitate the nevnual raising or lil'tingf ot the clamp 53 'ejection 5S providi-td at one end lo be tested, and designated l i placed upon the hase plate .l een it and the clamp 523, the projections 56 beingT igor-cod through the material to sesurely hold the same in plate. 1t dcsirrd. a piece of paper (Si) if; he placed between the mate all 5.4) and the clamp plate 5S to protect the material.

s earl. impression is made the platen is rotated by means oli4 a link (31 to alliance the paper tor the next impression This linl;

is eccentrically nicunted at one end on the shaft 5 and is provided at the other end with a. pawl 627 this pawl engaging a ratchet t3?, on the platen rfhe linlq (31 is held in enio. ement wi'ii ('13. [is the shaft 5 is rotated the linl; is reciprocat-ed to advance or intermittently rotate the platen. y'lfhe platen ma); lie

' lined l; hand; when thread the ratchet bv a spring" the paper through the n'itchine, liy .fr-.ienne o "-.inrled knob (il.

rEhe operation ot the device is as follows: rlhe handle G of the machine. rotated to g nient with the rear ends ot the type hais 8 to raise the type out ot' aa'enuan with the platen 5G. The dwell 1I-l ou the rain holds the bars in this position. The clamp 5? may then be raised and a piece ol tho carbon paper or other material to he id is inserted on top ot' the l `se plat;l and7 it desired. a piece olf paper or other suitable material placed on top ot the material b tested. The clamp is then allowed to ionic. down under tension o1 the spring` to hold the ma ,rial 29 against movement.

rlie paper trom the roll 2T then threaded through the machine as hereinbclore drscribed. The handle 6 isv then operated,

. CSU

causing the cani 7 to vibrate the typebars 8. a As the keys strike the paper an impres` sion is made." Each time the type bars are `lifted the link 61 operates to vrotate the' platen part of a revolution, thereby vadvancing the paperfor the next impression.V W ith each revolution'of the handle this. operation kis repeated and as many'impressions as desired may be made or the operation may be continued until the material being tested '1. In a machine of the class described, the

` combination of a platen, a plurality of pivotally mounted type bars adaptedto cooperlate lwith said platen, va pivotally mounted and means for moving said levers collectively to correspondingly varythe tension of all of said springs. Y

2. In a machine of the class described the combination of a platen, a plurality of pivoted type bars adapted to co-ope'rate with said platen, a plurality of pivoted tensioning leversl below said bars, means resilientlyy connecting one endV of each lever to a correspending bar, a pivotally mounted plate belowl said tensioning levers, the other end of each of said tensioning levers resting upon said plate, and means for raising and lowering said plate to raise and lower the tensioning levers to thereby. regulate' the tension of the type bars. Y

8. In a machine of the class described the combination of a platen,`a plurality of pivoted typevbars adapted to (zo-operate lwith,

said platen, a plurality of rocking tensioning levers located below said bars and resiliently secured thereto, a pivotally mounted plate below said tensioning levers, one end of each of said levers resting upon said plate, means for tilting said tensioning levers individually to adjust the tensio-n on the type bars and means for tilting said plate to collectively tilt saidtensioning levers to collectively adjust the tension of the type bars.

4:. In a machine of the classdescribed the combination of a platen, a plurality of type bars 3o-operating therewith, a shaft on rwhich said bars are pivotally mounted, a

plurality of tensioning levers, a shaft below and parallel with said Iir'st mentioned vvshaft springs.

levers for individually adjusting the tension of said connecting springs and means pivotally mounted on the second named shaft for collectively adjusting the ltension .of said 5. In a testing' machine the combination of a paper-containing compartment having a cover hinged at one end thereof and being provided with a slot at the other end through which the paper may be withdrawn from'the compartment, a platen around which the paper is guided, a resiliently mounted presser roller carried by said cover for maintaining said paper inengagement with said platen and a cutter carried by said cover for severing the paper after it passes under said presser roller.

6. In a testing machine the combination of a paper-containing compartment, a cover for said compartment one edge of which is spacedfrom the frontwall of the compartment to provide a slot through which the paper may be withdrawn, a platen adjacent said slot, means for guiding the paperY around said platen as it emerges from the compartment, means for guiding the paper to the cover of the compartmentas it leaves the compartment, and a paper cutter carried by the cover for severing the paper.

7. In a machine of the class described they combination ofa` casing, a platen therein, a plurality of type bars pivotally mounted in said casing and adapted to cooperate with 'said platen, a holder for material to be tested located between said bars and said platen and secured to said casing, a papercontaining chamber having a slot in one wall thereof through vwhich the papermay be withdrawn, and means for ,guiding said paper around said platen as it emerges from said chamber to be engaged by the material.

8. In a testing machine the combination of a casing, a platen rotatably mounted therein, a plurality of type bars pivotally mounted on saidcasing and adapted to co-operate with said platen, a holder for tliemat-erial being tested located between said platen and said type bars, a paper-containing compartment, means for guiding the paper from said compartment around said platen and between said platen andsaid material being tested, Ameans for oscillating said bars to cause them to strike the material being tested to make an impression onthe said paper, and means for turning said platen to advance the paper for the next impression.

9. In a testing machine the combination of a casing, a `platen rotatably mountedV therein, a plurality of type bars pivotally mounted in said casing and adaptedto cooperate vwith said platen, a holder for the material being `tested comprising a base plate and a hinged clamp under tension, said holder being located over said platen beneath said bars, :i` paper-containing compartment, means for guidingpaper from said compartmentv around said platen and beneath the material being` tested, n ezun rotatably mounted in said ezisingand adapted upon rotation to raise said bars out of typing position, means under tension for returning said bars to typing position whereby un impression is made upon said paper, :1nd means for turning Said platen to advance f the paper for the next impression.

This specification signed by us this 13 day of May 1924.-.

HAROLD WV. A. DXOX. LEVJIS M. DlXOl. 

